What you need:
. some wire or an old wire coathanger. some cotton or string. 2 cups of bubble mix (there’s a recipe here). an ice-cream container or lunch box that will fit your bubble-frame with room to move. a toothpick (or a sharp pencil) to make the hole

What to do:
. get someone to help you to bend the wire or coathanger into a circle – make sure you leave enough wire to make a handle that pokes out at an angle!. tie one end of a piece of string or cotton into a lasso, and tie the other end to the bubble-frame.. put the bubble-frame into the bubble mix so the frame and string are covered . gently lift the frame out of the mix. Once it’s out, tilt the frame so the excess bubble mix can drain off. turn the frame on its side, and put the toothpick in the lasso/loop part of the string.Watch that hole grow - you can even poke your finger through it!

What's going on:
Liquids – including bubble mix – are always a bit funny in thin layers. The liquid is really strongly attracted to itself, and repelled by the air around it. So the liquid in bubbles is always trying to avoid air, by making the smallest shape it can get away with.

Before you poked the hole in your bubble it was a flat, lazy circle, because that’s the shape that gave it the least contact with air, and the most contact with itself. Once you poked the hole, the bubble mix was able to shrink away from the air even more, by pulling the string loop apart. The bubble mix pulls on the string equally in all directions, so you end up with a beautiful circular hole!